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Reproductive system and spermatozoa of Paraturbanella teissieri (Gastrotricha, Macrodasyida): implications for sperm transfer modality in Turbanellidae

Functional anatomy of the sperm storage organs in Pulmonata: the simple spermatheca of Bradybaena fruticum (Gastropoda, Stylommatophora)

Zoomorphology : Volume 121, Issue 3, May 2002

Zoomorphology : Volume 121, Issue 2, October 2001

Zoomorphology : Volume 121, Issue 1, June 2001

Zoomorphology : Volume 120

Zoomorphology : Volume 119

Zoomorphology : Volume 118

Zoomorphology : Volume 117

Reproductive system and spermatozoa of Paraturbanella teissieri (Gastrotricha, Macrodasyida): implications for sperm transfer modality in Turbanellidae

Content Provider	Springer Nature Link
Author	Balsamo, Maria Ferraguti, Marco Guidi, Loretta Todaro, Antonio M. Tongiorgi, Paolo
Copyright Year	2002
Abstract	The morphology of the reproductive apparatus of several species of Turbanellidae, which are sequential hermaphrodites, has been studied for a comparison with that of other Gastrotricha Macrodasyida, which are simultaneous hermaphrodites. The common structural plan of the genital system of Turbanellidae includes two testes which extend into two sperm ducts turning anteriorly and fusing in a midventral pore, two ovaries with oocytes maturing in a cephalic direction and only one accessory organ, a seminal receptacle, provided with an external pore. A possible sperm transfer modality alternative to that described in the literature is advanced. Spermatological characters of Paraturbanella teissieri have been compared with those of the two Turbanella species studied up to date. Turbanellidae share with other Macrodasyida the general model of spermatozoon, but are the only representatives of this taxon known so far which have sperm devoid of the striated cylinder around the axoneme. Both the structure of the reproductive apparatus and the fine morphology of the spermatozoa of Turbanellidae species agree with the evolutionary view, recently supported by morphological and molecular data, which puts this taxon on a separate clade, early divergent from the stem lineage of Macrodasyida.
Starting Page	235
Ending Page	241
Page Count	7
File Format	PDF
ISSN	0720213X
Journal	Zoomorphology
Volume Number	121
Issue Number	4
e-ISSN	1432234X
Language	English
Publisher	Springer-Verlag
Publisher Date	2002-07-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Developmental Biology Animal Science and Zoology

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Reproductive system and spermatozoa of Paraturbanella teissieri (Gastrotricha, Macrodasyida): implications for sperm transfer modality in Turbanellidae

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